class_name TimeAnchorFrequencyProfile
extends Resource

@export var streak_thresholds: Array[int] = [0, 8, 16]
@export var anchors_per_window: Array[int] = [1, 2, 4]
@export var window_beats := 4


func interval_for_streak(streak: int) -> int:
	var anchors := anchors_per_window_for_streak(streak)
	return maxi(1, int(ceil(float(window_beats) / float(maxi(1, anchors)))))


func anchors_per_window_for_streak(streak: int) -> int:
	var count := 1
	for index: int in range(streak_thresholds.size()):
		if index >= anchors_per_window.size():
			break
		if streak >= streak_thresholds[index]:
			count = clampi(anchors_per_window[index], 1, maxi(1, window_beats))
	return count


func anchor_offsets_for_streak(streak: int) -> Array[int]:
	var safe_window := maxi(1, window_beats)
	var count := anchors_per_window_for_streak(streak)
	if count <= 1:
		return [safe_window]
	if count == 2:
		return [maxi(1, int(ceil(float(safe_window) * 0.5))), safe_window]
	var offsets: Array[int] = []
	for beat_offset: int in range(1, safe_window + 1):
		offsets.append(beat_offset)
	return offsets